I use my SSD (on my desktop) for my operating system and programs, and I bought one large enough to leave room for adding more programs. All of my data are on the traditional moving HDs. Given the cost coming down on SSDs, I can see the temptation to use them for data, but I'd look into the prospects of disk cleanup - you're not supposed to defragment SSDs. At least, last time I checked on it, you weren't supposed to. So what will happen to a drive with data moving around on it a lot?